Back to series Quantum 750

Quantum 757

Floor-standing loudspeaker, 3-way bass reflex with double bass

  • Hi-fi elegant: Slim front runner of the Quantum 750 range:
  • 25 mm fmax fabric tweeter with extended frequency range
  • Distortion-optimized 170 mm ceramic-aluminium cone woofer for particularly precise voice reproduction
  • Two 170 mm subwoofers with ceramic-aluminium membrane for very good bass reproduction
  • Extremely low-resonance 45 mm enclosure front panel on a reinforced body

Floor-standing loudspeaker, 3-way bass reflex with double bass

The Quantum 757 is the remarkably slim front-runner of the Quantum 750 range. It provides, in addition to the extremely low resonance. Besides the extremely low-resonance 45 mm case front on a corpus with multiple stiffening, it offers a clear and modern language of shape that is available in perfect high-gloss or silk-matt varnish finishes. The latest-generation computer-optimised loudspeaker chassis deliver an uncompromisingly clean and dynamic sound.

The Quantum 757 is available in a black, white and black-mocha finish. Two bass loudspeakers and one bass/mid-range loudspeaker with a diameter of 170 mm in conjunction with a ceramic-aluminium cone in a high-strength die-cast basket are responsible for highly precise sound and clean transitions to the powerful "F-Max" fabric dome tweeter with dual-compound cone. The offset high-gloss base is responsible for a stable stand and a perfect look.

Test reviews

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Absorbers or metal spikes - you decide!

All floor-standing speakers in the range can be set up with the support of resonance absorbers or, alternatively, metal spikes supplied additionally.

Gold-plated bi-wiring terminal

The loudspeaker cables are connected to the terminal with encapsulated clamps, providing secure contact even for larger gauge cables. Bi-amping and bi-wiring are also possible.

Bass/mid-range drivers in detail

The baskets of the 170 mm bass/mid-range drivers are made of torsion-resistant die-cast aluminium. Together with the aluminium-ceramic membranes, these chassis guarantee particularly high impulse fidelity and clean bass reproduction.

The noble art of precision

A high-efficiency Magnat Fmax tweeter consisting of a dual-compound fabric membrane operates in the treble range. A dampened pole piece hole produces a particularly harmonious transition to the mid-tone range.

Technical specifications

  • 3 way bass reflex, double bass
  • 6.5“ midrange
  • 2 x 6.5“ woofer
  • 1" tweeter
Power Handling (RMS/Max.)
  • 220 / 350 Watts
Sensitivity (2.8V/1m)
  • 93 dB
  • 4 – 8 Ohms
Frequency Response
  • 20 – 50.000 Hz
Crossover Frequencies
  • 250 Hz / 2800 Hz
Recommended Amplifier Output
  • > 30 watts
Dimensions (WxHxD)
  • 190 x 1062 x 370 mm
  • 24.8 kg


Highly modern design with silk matt lacquer and aluminium applications
  • Floorstanding speaker
Woofer / midrange
  • Ceramic/aluminium cones for best reproduction quality
  • Ventilated high-performance voice-coils ensure a high degree of operational reliability
  • Airflow-optimized, non-magnetic aluminium die-cast baskets to prevent turbulence and resonance effects
  • Solid aluminium/ABS flange with optimized acoustic transmission
  • Damped pole piece hole
  • Dual compound fabric cone
  • fmax tweeter with increased frequency range
  • Elaborated phase and amplitude optimized crossover with selected high-quality components
  • High-quality interior cabling
  • Bi-Wiring, Bi-Amping Option
  • Large terminal panel with solid and encapsulated connectors to accommodate the use of high-quality heavy gauge cables
  • Metal spikes included
  • Airflex ports with extremely wide openings for optimized bass connection
  • Very solid and elegant construction using MDF panels and elaborated struttings
  • 35 mm base plate in high gloss painting finish
  • 45 mm double-layer baffle in high gloss painting finish
  • Detachable grill
  • Big rubber resonance absorbers
Cabinet surface
  • Piano Black/Black satin
  • Piano White/White satin